Own one of the most mysterious and colorful gemstones today with an opal and diamond ring. Opals reflect every color of the rainbow, but for a very long time, it was impossible to figure out why. In the 1960's, a team of Australian scientists analyzed these October birthstones with an election microscope and discovered that small spheres from silica gel caused interference and refraction manifestation, responsible for their remarkable display of colors. Simply put, opals are a gel from silica, with a varying percentage of water. Notice and buy an opal and diamond ring, and you will be one of the lucky people to wear one of the most magnificent jewels available.